Question 1

What is CAGR?

Accepted Answer

Compound annual growth rate = (end ÷ start)^(365/days) − 1. It converts any total return into the equivalent smooth yearly rate, so you can compare investments held for different periods.

Question 2

Why can annualized returns be misleading?

Accepted Answer

Because annualizing a short, lucky period exaggerates it — a 20% gain in a week annualizes to thousands of percent that won't repeat. Use CAGR over meaningful periods, not a hot week.

年率リターン (CAGR) 計算ツール

比較するには年間化しますが、短い期間に注意してください